It's been 20 years since grunge gods Pearl Jam made their debut with the mega-smash Ten LP back in 1991. Now, the band are celebrating two decades in the industry by reissuing Vs. (1993) and Vitalogy (1994). Along with the standard single-disc remasters, which were unveiled last week, the group have announced that the two albums will be packaged together in a deluxe edition set, as well as an even bigger box set.

The deluxe edition will include the remastered versions of Vs. and Vitalogy, along with the already-announced bonus tracks. There will also be a third disc containing concert bootleg Live at the Orpheum Theater, Boston, April 12, 1994. According to a press release, it "showcases a dream setlist created especially by the Pearl Jam crew and has for years been one of the most sought-after recordings among serious aficionados."

The real treat is the massive box set, which will include a whopping five LPs, four CDs, one cassette, a book and an envelope stuffed with memorabilia. The LPs and CDs will contain the same music as the deluxe edition CDs (Vs., Vitalogy, Live at the Orpheum Theater, Boston, April 12, 1994). The cassette will feature the January 8, 1995 episode of the band's Monkeywrench/Self-Pollution radio series. It has "live tributes and studio performances from a number of Pearl Jam's fellow artist friends." For those who don't have a record player or a cassette deck, the box will also include download codes.

As for the box's non-musical goodies, there will be a "80-page composition book filled with photos, drawings and artwork by [singer] Eddie Vedder and [bassist] Jeff Ament." Finally, the memorabilia envelope will include "lithographs of each band member, postcards, posters and much more."

The box set, as well as the deluxe edition CDs, are out on March 29 via Epic/Legacy. While the CDs will be available in stores, the box can only be purchased from PearlJam.com.